Black Box LB0010A-A24-R2 User manual

MARCH 1999
LB0010A-A24-R2 LB0010A-A36-R2 LB0010A-A21-R2 LB0010A-AMST-R2
LB0010A-U24-R2 LB0010A-U36-R2 LB0010A-U21-R2 LB0010A-UMST-R2
LB0010A-A35-R2 LB0010A-A530-R2 LB0010A-A4W-R2 LB0010A-ASST-R2
LB0010A-U35-R2 LB0010A-U530-R2 LB0010A-U4W-R2 LB0010A-USST-R2
Remote MiniBridge
CUSTOMER SUPPORT INFORMATION
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]

1
FCC AND IC STATEMENTS
FEDERAL COMMUNICATIONS COMMISSION
AND
INDUSTRY CANADA
RADIO-FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio frequency energy
and if not installed and used properly, that is, in strict accordance with the
manufacturer’s instructions, may cause interference to radio communication.
It has been tested and found to comply with the limits for a Class A computing
device in accordance with the specifications in Subpart J of Part 15 of FCC rules,
which are designed to provide reasonable protection against such interference
when the equipment is operated in a commercial environment. Operation of
this equipment in a residential area is likely to cause interference, in which case
the user at his own expense will be required to take whatever measures may be
necessary to correct the interference.
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission from
digital apparatus set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.

2
REMOTE MINIBRIDGE
EUROPEAN UNION DECLARATION OF CONFORMITY
The manufacturer declares that the Remote Minibridge conforms
to the following standards:
• EN55022 (1994): Limits and methods of measurement of radio
disturbance characteristics of information technology equipment.
• EN50082-1 (1992): Electromagnetic compatibility: Generic immunity
standard for residential, commercial, and light industry.
The Remote MiniBridge herewith complies with the requirements of
the EMC Directive 89/336/EEC. The product was tested in a typical
configuration.

3
NOM STATEMENT
NORMAS OFICIALES MEXICANAS (NOM)
ELECTRICAL SAFETY STATEMENT
INSTRUCCIONES DE SEGURIDAD
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes
de que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para
referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones
de operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo,
cerca de la tina de baño, lavabo, sótano mojado o cerca de una alberca,
etc..
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales
que sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea
recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más
allá a lo descrito en las instrucciones de operación. Todo otro servicio
deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no
interfiera su uso. La colocación del aparato eléctrico sobre una cama,
sofá, alfombra o superficie similar puede bloquea la ventilación, no se
debe colocar en libreros o gabinetes que impidan el flujo de aire por
los orificios de ventilación.

4
REMOTE MINIBRIDGE
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor
como radiadores, registros de calor, estufas u otros aparatos (incluyendo
amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo
del tipo descrito en el instructivo de operación, o como se indique en
el aparato.
12. Precaución debe ser tomada de tal manera que la tierra fisica y la
polarización del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que
no sean pisados ni pellizcados por objetos colocados sobre o contra ellos,
poniendo particular atención a los contactos y receptáculos donde salen
del aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos
de las lineas de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo
no sea usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos
no sean derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro
del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio
en su desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.

5
UL STATEMENTS
UL Listing Requirements
IMPORTANT SAFETY INSTRUCTIONS
For North American Users
The Remote MiniBridge is powered by an external power
supply. To reduce the risk of shock, fire, and injury, use it
only with a UL®listed and CSA Certified Class 2 power supply
rated 12 VDC, 400 or more mA.
Exigences UL
INSTRUCTIONS IMPORTANTS DE SÉCURITÉ
Pour les utilisateurs Nord Americains
Le MiniBridge Remote est renforcé par un transformateur
extérieur. Afin de réduire le risque d’électrocution, de feux
ou de blessure, utiliser seulement avec le UL listé et le CSA
Certifié classe 2 le transformateur de 12 VDC, 400 mA ou plus.

6
REMOTE MINIBRIDGE
TÜV Certification Requirements
European Users
Electrical ratings: 12 VDC, 400 or more mA
CAUTION!
To reduce the risk of electric shock, fire, and injury, use
only with a power supply which is approved for the
latest version of EN 60950.
TÜV-Zertifizierungsanforderungen
Europäische Benutzer
Leistungsaufnahme: 12 VDC, 400 oder mehr mA
ACHTUNG!
Um das Risiko eines elektrischen Schlages oder
Brandes so weit wie möglich zu vermeiden, verwenden
Sie nur ein Stromversorgung das gemäß der neuesten
Version des Standards EN 60950 zugelassen ist.

7
TABLE OF CONTENTS
Contents
1. Specifications ..................................................... 8
2. Introduction ..................................................... 14
2.1 LAN-Interface Overview ........................... 15
2.2 WAN-Interface Overview .......................... 15
3. Installation ....................................................... 19
3.1 Switch Setting ............................................ 19
3.2 LAN Interface ........................................... 20
3.3 WAN Interface .......................................... 21
3.3.1 RS-232 or RS-530 Models ............... 21
3.3.2 V.35, RS-449 (V.36), or
X.21 Models ................................ 22
3.3.3 Fiberoptic Models ........................... 23
3.3.4 Four-Wire Models ........................... 23
3.4 Power ......................................................... 26
4. Operation ......................................................... 27
5. Troubleshooting .............................................. 28
5.1 Calling Black Box ..................................... 28
5.2 Shipping and Packaging ......................... 29
Appendix: WAN Pinouts ....................................... 30

8
REMOTE MINIBRIDGE
1. Specifications
Compliance — CE; FCC Class A, IC Class/classe A
Standards — LAN: IEEE 802.3 Ethernet v. 2
Interfaces —
LAN:
“-Axx” models: 10BASE5 AUI;
“-Uxx” models: 10BASE-T;
WAN:
“-x24” models: TIA RS-232/ITU-TSS V.24/V.28, DTE;
“-x35” models: ITU-TSS V.35;
“-x36” models: TIA RS-422/ITU-TSS V.36;
“-x53” models: TIA RS-530;
“-x21” models: ITU-TSS X.21;
“-x4W” models: Proprietary 4-wire;
“-xMST” models: 850-nm multimode fiberoptic;
“-xSST” models: 1300-nm single-mode fiberoptic
Protocols — WAN: Synchronous or asynchonous,
embedded in RFC 1662 variant of HDLC framing
LAN Table — 10,000 MAC addresses with five-minute
automatic aging (updating)
Filtering and Forwarding — 14,880 packets (frames)
per second

9
CHAPTER 1: Specifications
Buffer Size — 256 frames
Throughput Delay — 1 frame
Data Format — WAN: HDLC-like frames (in async mode,
these are broken into 8-data-bit octets which are
preceded by a start bit and followed by a stop bit)
Flow Control — None
Operation —
LAN:
AUI models: Half-duplex;
10BASE-T models: Half- or full-duplex
Data Rate —
LAN:
Full-duplex 10BASE-T: 20 Mbps;
AUI or regular 10BASE-T: 10 Mbps;
WAN:
Synchronous: Up to 10 Mbps;
Asynchronous (all except 4-wire and fiberoptic
models): 115.2, 57.6, 38.4, 28.8, 19.2, 14.4, or
9.6 Kbps (user-selectable, but see Section 2.2)
Clock Source — WAN: External only

10
REMOTE MINIBRIDGE
Fiber Specifications (Fiberoptic Models Only) —
Optical output power:
“-xMST” models: –18 dBm into 62.5/125 µm fiber;
“-xSST” models: –18 dBm into 9/125 µm fiber;
Receiver sensitivity: –32.5 dBm;
Dynamic Range: 20.5 dBm minimum;
Maximum Distance —
LAN:
AUI models: 50 m (164 ft.) to attached device;
10BASE-T models: 100 m (328.1 ft.) to attached device;
WAN:
“-x4W” models: 700 m (2296 ft.) over Category 5 or
screened/shielded Category 3 cable at 5 Mbps
(see Sections 3.1 and 3.3.4);
“-xMST” models: Approx. 3 km (1.8 mi.) depending
on fiber quality;
“-xSST” models: Approx. 20 km (12.4 mi.) depending
on fiber quality;
All other models: Standard maximum distance for
given interface
User Controls — (1) Top-mounted 4--position DIP switch
for filtering; compression; either SQE (AUI models)
or full- vs. half-duplex (10BASE-T models); and either
10 Mbps/normal distance vs. 5 Mbps/long distance
(4-wire models) or sync/async (all other models)

11
CHAPTER 1: Specifications
Indicators —
(4) Top-mounted LEDs:
WAN (lights yellow in response to WAN data activity),
LAN (all models: lights yellow in response to LAN
data activity; 10BASE-T models: lights green to show
link integrity),
COLL (lights red in response to LAN collision), and
PWR (lights green while unit is powered)
Connectors —
LAN:
Models with “-Axx” product-code suffix: DB15 male;
Models with “-Uxx” product-code suffix: Shielded
RJ-45 female;
WAN:
“-x24” models: DB25 female;
“-x35” models: DB25 female, proprietarily pinned for
V.35 (patch cable to M/34 included);
“-x36” models: DB25 female, pinned for TIA RS-530
(patch cable to DB37 included);
“-x53” models: DB25 female;
“-x21” models: DB25 female, pinned for TIA RS-530
(patch cable to DB15 included);
“-x4W” models: 5-screw terminal block;
“-xxST” models: (2) ST®female;

12
REMOTE MINIBRIDGE
CAUTION!
Although the Remote MiniBridge can operate on any
regulated 12-VDC power supply that provides at least
400 mA of current, using a different power supply from
the one the unit came with will void CE compliance for
the 4-wire and fiberoptic models.
MTBF — 506,000 hours
Temperature Tolerance — 32 to 122˚F (0 to 50˚C)
Humidity Tolerance — Up to 90% noncondensing
Power —
From desktop autosensing power supply:
Input: 100 to 250 VAC, 50 to 60 Hz;
Output: 12 VDC, at least 400 mA;
Consumption:
Fiberoptic models: 300 mA (3.6 watts) typical,
400 mA (4.8 watts) maximum;
All other models: 200 mA (2.4 watts) typical,
400 mA (4.8 watts) maximum
Size —
Fiberoptic models:
0.7"H x 2.1"W x 3"D (1.8 x 5.3 x 7.6 cm);
All other models:
0.7"H x 2.1"W x 2.7"D (1.8 x 5.3 x 6.9 cm)

13
CHAPTER 1: Specifications
Weight —
Fiberoptic models: 1.6 oz. (50 g);
All other models: 1 oz. (30 g)

14
REMOTE MINIBRIDGE
2. Introduction
The Remote MiniBridge (RMB) is a high-performance,
remote, self-learning Ethernet bridge. Its small size
and low cost make it ideal for cost-sensitive bridging
applications, as well as for LAN-extender or segmenter
applications.
The RMB automatically learns MAC addresses on the
LAN to which it is connected and only forwards frames
destined for another LAN. Its LAN table stores up to
10,000 addresses and is automatically updated.
Filtering and forwarding is performed at 14,880 pps
(packets per second), just shy of the maximum
theoretical wire-speed rate of 15,000 pps. The RMB’s
buffer can hold 256 frames with a throughput latency
of 1 frame. Alternatively, filtering can be disabled for
extender or segmenter applications.

15
CHAPTER 2: Introduction
2.1 LAN-Interface Overview
The Remote MiniBridge comes in either of two LAN
interfaces: 10BASE-T or 10BASE5 (AUI) Ethernet.
10BASE-T models can operate in full-duplex Ethernet
(20 Mbps). AUI models can’t do this, but they can draw
power directly from the AUI interface, so you might not
need to use an external power source. However, if you
want to drive AUI signals any distance, or if the AUI
port to which the RMB is attached doesn’t provide an
adequate amount of power, use the included external
power supply to override the AUI supply. On all models,
you can disable the Ethernet SQE test for hub or
repeater connections.
2.2 WAN-Interface Overview
The Remote MiniBridge is also available with any
of eight WAN interfaces—TIA RS-232 (ITU-TSS
V.24/V.28), ITU-TSS V.35, TIA RS-422/449 (ITU-TSS
V.36), TIA RS-530, ITU-TSS X.21, proprietary 4-wire,
multimode fiberoptic, or single-mode fiberoptic.
The RMB transmits and receives data synchronously
at up to 10 Mbps. Alternatively, all RMBs except for the
4-wire and fiberoptic models can communicate

16
REMOTE MINIBRIDGE
asynchronously at up to 115.2 Kbps if you tie some of the
unit’s DB25 pins to ground (see Table 2-1 below). The
RMB can internally generate seven standard asynchron-
ous frequencies (9.6, 14.4, 19.2, 28.8, 38.4, 57.6, and
115.2 Kbps), or it can derive a different asynchronous
data rate by dividing by sixteen the frequency of a sync
signal on Pin 15. For example, if you want the RMB to
communicate asynchronously at 4800 bps, the device
attached to its WAN side has to provide a sync signal
at 4800 x 16 (= 76,800) bps on Pin 15.
Table 2-1. Grounding for asynchronous control.
Data Rate or DB25 Pin 6 DB25 Pin 8 DB25 Pin 17 DB25 Pin 22
Feature Grounded? Grounded? Grounded? Grounded?
Follow ext. clock Yes Yes Yes N/A
(sync on Pin 15)
115.2 Kbps Yes Yes No N/A
57.6 Kbps Yes No Yes N/A
38.4 Kbps Yes No No N/A
28.8 Kbps No Yes Yes N/A
19.2 Kbps No Yes No N/A
14.4 Kbps No No Yes N/A
9.6 Kbps (default) No No No N/A
ACCM enabled N/A N/A N/A No
(default)
ACCM disabled N/A N/A N/A Yes

17
CHAPTER 2: Introduction
The Remote MiniBridge uses a variant of HDLC
framing for WAN communication, in accordance with
RFC 1662. In asynchronous mode, the RMB breaks up
the frames into 8-data-bit octets which are preceded by a
start bit and followed by a stop bit. To make this process
transparent (to achieve “frame transparency”), it
normally uses “octet stuffing”—it replaces any flag
sequence (0x7E), control-escape octet (0x7D), or other
single octet in its Async Control-Character Map (ACCM)
with two octets: the control-escape octet followed by the
original octet XORed with 0x20. The ACCM consists of
the first 32 characters in the ASCII character set (those
with octet values up to 0x20). You can disable ACCM
octet stuffing by tying Pin 22 of the RMB’s DB25
connector to ground (refer to Table 2-1 on the
previous page).
If you want to, you can also enable enhanced
compression, which increases data throughput by
stripping the padding bits from the 64-byte frames.
(When compression is disabled, frames are transmitted
as is.) See Table 3-1 on page 22.

18
REMOTE MINIBRIDGE
The RMB’s comprehensive LED display indicates LAN
and WAN activity, link integrity (on 10BASE-T models),
and power (see Chapter 4). The unit has four
conveniently located DIP switches for easy configuration
(see Section 3.1).
A typical application for the Remote MiniBridge
is shown in Figure 2-1 below.
Figure 2-1. A Remote MiniBridge application.
Stackable
Ethernet Hub
Remote
MiniBridge
Modem Modem
Remote
MiniBridge
Ethernet
Switch

19
CHAPTER 3: Installation
3. Installation
3.1 Switch Setting
Refer to Table 3-1 on the next page as you set the
Remote MiniBridge’s top-mounted DIP switches.
3.2 LAN Interface
If your Remote MiniBridge is an AUI model, either plug
it directly into the DTE’s AUI port or attach it to the
DTE’s AUI port with a standard AUI cable.
If your Remote MiniBridge is a 10BASE-T model, use
either a straight-through-pinned or cross-pinned cable
to attach the unit to a device’s 10BASE-T port:
• Run straight-through cable to connect the RMB
to a hub or similar device.
• Run cross-pinned cable to connect the RMB
to a NIC, workstation, or similar device.